package com.lkx.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lkx.common.R;
import com.lkx.dto.DishDto;
import com.lkx.pojo.Category;
import com.lkx.pojo.Dish;
import com.lkx.pojo.DishFlavor;
import com.lkx.pojo.Setmeal;
import com.lkx.service.CategoryService;
import com.lkx.service.DishFlavorService;
import com.lkx.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachePut;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;

import java.io.File;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @ClassName: com.lkx.controller.DishController
 * @author: likaixin
 * @create: 2022年11月23日 17:07
 * @desc:
 */
@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Value("${reggie.path}")
    private String basePath;
    @Autowired
    private CacheManager cacheManager;
    @Autowired
    private RedisTemplate redisTemplate;
    @PostMapping//新增菜品
    @CachePut(value = "dish",key = "#dishDto.id")
    public R<String> save(@RequestBody DishDto dishDto) {
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);
        dishService.saveWithFlavor(dishDto);
        return R.success("新增菜品成功");
    }

    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(Objects.nonNull(name), Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }
    //修改菜品

    /**
     * @Date: 2022-11-24
     * @Time: 9:17
     * @Param: [id]
     * @return: com.lkx.common.R<com.lkx.dto.DishDto>
     * @desc: 根据id查询菜品信息和对应的口味信息
     **/
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }
    @PutMapping()
    public R<String> update(@RequestBody DishDto dishDto){
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);
        dishService.updateWithFlavor(dishDto);
        return R.success("修改菜品成功");
    }

    /**
     * @Date:  2022-11-24
     * @Time:  10:17
     * @Param: [ids]
     * @return: com.lkx.common.R<java.lang.String>
     * @desc: 根据id删除菜品。和批量删除
     **/
    @DeleteMapping
    @Transactional
    public R<String> delete(Long[] ids){
        log.info("根据id删除{}", ids);
            List<Long> collect = Arrays.stream(ids).collect(Collectors.toList());
            LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
            lqw.eq(Dish::getStatus,0).in(Dish::getId,collect);
            //dishService.removeByIds(collect);
            boolean flag = dishService.remove(lqw);
            if (flag){
                LambdaQueryWrapper<DishFlavor> lqw2 = new LambdaQueryWrapper<>();
                lqw2.in(DishFlavor::getDishId,ids);
                boolean b = dishFlavorService.remove(lqw2);
                if (b){
                    List<Dish> dishList = dishService.listByIds(Arrays.stream(ids).collect(Collectors.toList()));
                    for (int i = 0; i < dishList.size(); i++) {
                        File file = new File(basePath, dishList.get(i).getImage());
                        if (Objects.nonNull(file)) file.delete();


                    }
                    return R.success("删除菜品成功");
                }
            }

        return R.error("菜品启售状态，不能删除！");
    }
    @PostMapping("/status/{status}")
    public R<String> modifyStatusById(@PathVariable Integer status, Long[] ids){
        log.info("当前状态是{}",status);
        log.info("根据id更改状态：{}",ids);
        List<Dish> dishList = dishService.listByIds(Arrays.stream(ids).collect(Collectors.toList()));
        for (int i = 0; i < dishList.size(); i++) {
            String key="dish_"+dishList.get(i).getCategoryId()+"_1";
            redisTemplate.delete(key);
        }

        boolean flag = dishService.modifyStatus(ids, status);
        if (flag){
            return R.success("ok");
        }
        return R.error("更改失败");

    }
    /**
     * @Date:  2022-11-24
     * @Time:  16:18
     * @Param: [dish]
     * @return: com.lkx.common.R<java.util.List<com.lkx.pojo.Dish>>
     * @desc: 根据条件查询对应的菜品数据
     **/
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
//        lqw.eq(Objects.nonNull(dish.getCategoryId()),Dish::getCategoryId,dish.getCategoryId())
//                .orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime).eq(Dish::getStatus,1);
//        List<Dish> list = dishService.list(lqw);
//
//        return R.success(list);
//    }
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList =null;
        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //先从redis中获取缓存数据
        dishDtoList  =(List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList!=null){
            //如果存在，直接返回，无序查数据库
            return R.success(dishDtoList);
        }

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库缓存到redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }
}
